CN101611544A - Balanced amplifying device with bypass branch - Google Patents
Balanced amplifying device with bypass branch Download PDFInfo
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- CN101611544A CN101611544A CNA2007800516009A CN200780051600A CN101611544A CN 101611544 A CN101611544 A CN 101611544A CN A2007800516009 A CNA2007800516009 A CN A2007800516009A CN 200780051600 A CN200780051600 A CN 200780051600A CN 101611544 A CN101611544 A CN 101611544A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/60—Amplifiers in which coupling networks have distributed constants, e.g. with waveguide resonators
- H03F3/602—Combinations of several amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0277—Selecting one or more amplifiers from a plurality of amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/72—Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/192—A hybrid coupler being used at the input of an amplifier circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/198—A hybrid coupler being used as coupling circuit between stages of an amplifier circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/204—A hybrid coupler being used at the output of an amplifier circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/72—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
- H03F2203/7227—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal the gated amplifier being switched on or off by a switch in the supply circuit of the amplifier
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/72—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
- H03F2203/7239—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal the gated amplifier being switched on or off by putting into parallel or not, by choosing between amplifiers and shunting lines by one or more switch(es)
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Abstract
A kind of balance amplifier comprise bypass branch (19), termination element (TE1, TE2) and amplifier section (10).This part (10) comprises amplifier (A1, A2), the first coupling/separative element (14), the 4th port (14d) that this first coupling/separative element (14) has the first input signal receiving port (14a), is connected to second port (14b) of termination element (TE1), is connected to the 3rd port (14c) of first amplifier (A1) and is connected to second amplifier (A2).This part (10) also comprises the second coupling/separative element (16), the 3rd port (16c) that this second coupling/separative element (16) has first port (16a) that is connected to first amplifier (A1), second port (16b) that is connected to second amplifier (A2) and is connected to termination element (TE2).Second coupling/the separative element (16) is to (A1, signal A2) make up as the output signal on the 4th port (16d) so that be supplied to signal output (O) from amplifier.Branch (18) is connected to second port (14b) of the first coupling/separative element (14) and by-passing signal is provided to output (O).
Description
Technical field
The present invention relates to the field of balanced amplifying device, and relate more specifically to a kind of WAP (wireless access point) that is configured to the balanced amplifying device of operating with normal mode and bypass (bypass) pattern and is used to comprise the wireless network of this balanced amplifying device.
Background technology
Normally used low noise amplifier is so-called balance low noise amplifier in wireless communication field, and it is used in the base station usually.This amplifier is then made by the first coupling/separation (splitting) unit with four ports usually, wherein first port receives the input signal from antenna, second port is connected to electric termination element (termination element), the 3rd port is connected to the input of first amplifier, and the 4th port is connected to the input of second amplifier.The output of first amplifier is connected from here to first port of the second coupling/separative element and the output of second amplifier is connected to second port of the second coupling/separative element.The 3rd port of the second coupling/separative element is connected to electric termination element and the 4th port of the second coupling/separative element is connected to signal output.These coupling/separative elements are at this normally so-called hybrid coupler or three-dB coupler.Under operation or active (active) pattern, the input signal that is received on first port of the first coupling/separative element is separated to offer first and second amplifiers, wherein at first and second amplifiers signal is amplified.After amplifying, these two signals are combined in the second coupling/separative element then and are provided to output, this thereby provide through amplifying signal.
Usually provide bypass branch in order to make for example owing to fail when amplifier power supply makes the amplifier existing problems can received signal, this bypass branch does not have the signal that supply is enlargedly received.Even this allows the base station also can move when amplifier is not worked.In this way, even amplifier does not move, operator also can continue the service that provides limited.So bypass branch is connected to the signal input and is connected to signal via second switch with such known configurations and exports via first switch.This signal passes through this branch with so-called bypass mode then.
Yet, utilize this solution, bypass mode and active mode in these two signal all can pass through switch.Therefore, the following parameter of all of switch performances pair amplifier all has very big influence: return loss, noise factor, reverse isolation and gain.In all these situations, switch performances all is a limiting factor.Implement in the input of amplifier that switch just additionally inserts loss, possible stability problem and MTBF (Mean Time Between Failure, mean time between failures (MTBF)) is always controversial.Other problem is the high reverse isolation of required switch, this be for the stability of guaranteeing amplifying device (self-oscillation vulnerability to jamming) needed.Selection to the possible switch that can be used is subject to this fact that non-transformer can be used under bypass mode.Above mentioned problem is very undesirable, because amplifier should be good as far as possible under normal mode.And bypass mode only is the safety measure that should seldom use.The efficient that this means the certain pair amplifier of this safety measure causes restriction.
Therefore a kind of solution of removing or limiting above mentioned these problems and still allow to use bypass branch simultaneously need be provided.
Summary of the invention
The present invention is directed to provides a kind of improved balanced amplifying device that is equipped with bypass branch.
According to the present invention, this is to solve with the output that by-passing signal is fed to device by the other end that the end with bypass branch is connected to the port of the first coupling/separative element that is connected with electric termination element and is connected this branch basically.
A target of the present invention provides a kind of improved balanced amplifying device that is equipped with bypass branch.
According to the present invention, this realizes that by following balanced amplifying device described balanced amplifying device is configured to operate and comprise under normal mode and bypass mode:
The signal bypass branch,
At least one electric termination element, and
Amplifier section comprises
First and second amplifiers,
First coupling/the separative element comprises at least four ports, wherein
The first port receiving inputted signal,
Second port is connected to switching device (switching arrangement) so that described second port is selectively connected thereto electric termination element or bypass branch,
The 3rd port be connected to first amplifier input and
The 4th port is connected to the input of second amplifier, so as to be separated in the input signal that receives on first port with offer via third and fourth port first and second amplifiers and
Second coupling/the separative element comprises at least four ports, wherein
First port is connected to the output of first amplifier,
Second port is connected to the output of second amplifier,
The 3rd port is used to be connected to electric termination element, and
The wherein said second coupling/separative element is arranged to being made up by the first and second amplifier amplifying signals and be provided on the 4th port so that be fed to the signal output of described device as output signal, and
Described signal bypass branch one end is connected to second port of the first coupling/separative element via described switching device and the other end is connected for by-passing signal is fed to the output of described device.
Power amplifier device can be advantageously provided in the WAP (wireless access point) such as the base station.
The present invention has following advantage.Input signal can not pass through any switch under normal mode, this means to compare with known solution can amplify more weak signal and bypass segment is provided simultaneously.This is due to the following facts: that bypass segment is connected to amplifier via the port of first coupling unit, described port is terminated (terminate) usually under normal mode; And the input signal of auto levelizer all is directly connected to first port of first coupling unit under active and bypass mode.This thus have positive influence to the loss under the normal mode and to return loss, noise factor, isolation and gain.
What should emphasize is that term " comprises/comprise " existence that is regarded as specifying described feature, step or assembly when being used for this specification, but does not get rid of the existence or the interpolation of one or more further features, step, assembly or its group.
Description of drawings
To the present invention be described at accompanying drawing now, in the accompanying drawings:
Fig. 1 shows the circuit diagram according to the balanced amplifying device of the first embodiment of the present invention,
Fig. 2 shows the circuit diagram of balanced amplifying device according to a second embodiment of the present invention,
Fig. 3 shows the circuit diagram of the balanced amplifying device of a third embodiment in accordance with the invention,
Fig. 4 shows the circuit diagram of the balanced amplifying device of a fourth embodiment in accordance with the invention,
Fig. 5 show balanced amplifying device according to a fifth embodiment of the invention circuit diagram and
Fig. 6 has schematically shown two radio transmission device-base stations and mobile radio station that communicates with one another, and wherein this base station can comprise according to balanced amplifying device of the present invention.
Embodiment
The present invention relates to a kind of balanced amplifying device, this balanced amplifying device is equipped with the bypass branch that can operate under normal mode and bypass mode.This balanced amplifying device can be used to the communication of in wireless network (for example in mobile communications network).And this balanced amplifying device is advantageously provided in the WAP (wireless access point) of network, for example in the base station.
As mentioned in the prior art part, be equipped with the known balanced amplifying device of bypass branch to be included in the switch of (promptly in the input of its place's received signal) in the input of amplifying device, so that when being in bypass mode, realize walking around (bypass) amplifying device.Yet signal also can pass through this switch under normal mode.Because all component that provides all has negative effect to signal, will be subjected to the negative effect of switch so this means the actual signal that under normal mode, is received by amplifying device in signal path.This means that perhaps WAP (wireless access point) can not handle to such an extent that should handle well like that with it to input signal, this has reduced performance.Therefore, interested is to strengthen the performance of this balanced amplifying device but do not remove bypass branch.
The present invention is directed to and address this problem.
Circuit diagram among Fig. 1 shows first embodiment of balanced amplifying device.This balanced amplifying device is a low noise amplifier, comprises amplifier section 10 and bypass and isolated part 12, and these two all is shown frame of broken lines.This amplifier section 10 comprises the first coupling/separative element 14 of input hybrid coupler 14 forms.Input hybrid coupler 14 has four ports, and wherein the first port one 4a is as input port and as the input I of amplifying device, and the second port one 4b is as the isolated port under the normal mode and therefore be connected to bypass and isolated part 12.The 3rd port one 4c of input hybrid coupler 14 is connected to the input of the first amplifier A1, and the 4th port one 4d of input hybrid coupler 14 is connected to the input of the second amplifier A2.Amplifier A1 and A2 comprise that necessary coupling is with the biasing (not shown) and be provided to power (also not shown).The output of the first amplifier A1 is connected to the first port one 6a of the second coupling/separative element of output hybrid coupler 16 forms, and the output of the second amplifier A2 is connected to the second port one 6b of output hybrid coupler 16.In this way, amplifier A1 and A2 are arranged in parallel between two couplers 14 and 16.The 3rd port one 6c of output hybrid coupler 16 is as the isolated port under the normal mode and therefore also be connected to bypass and isolated part 12, and the 4th port one 6d of output hybrid coupler 16 provides output O, the output signal of this output O supply amplifying device.When being connected to electric termination element, just created the 3rd port one 6c of the second port one 4b of input hybrid coupler 14 and output hybrid coupler 16 balance amplifier section 10.
Employed hybrid coupler the 14, the 16th among the present invention, any 3dB, 90 degree hybrid coupler or equivalent electric circuits.
Bypass and isolated part 12 comprise the first input by-pass switch SW1, this switch SW 1 is connected to the second port one 4b of input hybrid coupler 14 and is arranged to switch between the two positions, and it is connected port one 4b and it is connected port one 4b with bypass branch 19 in the second place with the first electric termination element TE1 in primary importance.The first electric termination element TE1 is provided by first resistor that is connected to ground GND at this.Bypass and isolated part 12 also comprise the first output by-pass switch SW2, this switch SW 2 is connected to the 3rd port one 6c of output hybrid coupler 16 and is arranged to switch between the two positions, and it is connected the 3rd port one 6c and it is connected the 3rd port one 6c with bypass branch 19 in the second place with the second electric termination element TE2 in primary importance.These two by-pass switch SW1 and SW2 constitute a kind of switching device to be used for the second port one 4b with input hybrid coupler 14 and to be selectively connected thereto the first electric termination element TE1 or branch 19 and to be used for by-passing signal is fed to output O at this.The second electric termination element TE2 is provided by second resistor that is connected to ground GND at this.A bypass branch 19 thereby an end are connected to the second port one 4b of input hybrid coupler 14 and the other end is connected for by-passing signal is fed to the output O of this device.The other end of bypass branch 19 thereby be connected to the 3rd port one 6c of output hybrid coupler 16 in this first embodiment.Branch 19 comprises suitable connecting elements at this, and this connecting elements is a transmission line 18 in this embodiment.Yet it can also be a standard cable.
Under normal mode operation, all be connected to corresponding electric termination element TE1 and TE2 so that guarantee required reverse isolation and return loss to the first input by-pass switch SW1 of amplifier A1 and A2 supply power and switching device and the first output by-pass switch SW2.Be received, be separated into two parts on the first port one 4a at input hybrid coupler 14 in known manner at the input signal that this received, described two parts are provided on two the port one 4c and 14d of input of amplifier A1 and A2.Any reflection of returning from amplifier A1 and A2 is stopped by the first termination element TE1.These amplifiers A1 and A2 will partly be provided to output hybrid coupler 16 through amplifying signal then, and this coupler 16 makes up them and the signal that makes up is provided on the output O as output signal.Anyly be reflected in this and stopped by the second termination element TE2.Up to the present described is well known in the art.
Yet, under bypass mode, to be lost or removed to the power of amplifier A1 and A2, this also makes by-pass switch SW1 and SW2 change position so that port one 4b and 16c and is connected to bypass branch 19, this expression low insertion loss transmission line.Now because amplifier A1 and A2 do not have received power, so they can not amplify being separated into two-part input signal.Do not make under the state of bias voltage polarization at this, these active devices A1 and A2 be mismatch highly, thereby reflects input signal rather than absorb them.Instead input signal part therefore be exaggerated device A1 and A2 reflection and thereby reenter input hybrid coupler 14, they are combined and are provided to bypass branch 19 via port one 4b in input hybrid coupler 14.Signal is provided to the 3rd port one 6c of output hybrid coupler 16 therefrom.Output hybrid coupler 16 separates these signals now and these two parts is provided to the output of amplifier A1 and A2, and this signal is reflected, is combined in output hybrid coupler 16 then and be provided on the output O as output signal from this output.This shows that input signal is not amplified by bypass in this case.As long as it is almost completely identical that amplifier A1, A2 keep, the impedance at input port I or output port O place just can not change.
Start bypass mode by from circuit, removing supply voltage.It also can remotely be controlled.Removing of power can be wittingly or owing to fault is carried out.
In this way, input signal under the situation of fault by bypass.And this signal can be by any switch under the normal mode.Therefore compare with known solution " cleaner " and stronger input signal are provided.This means that performance is strengthened under normal mode, this means signal more weak in can the known solution of amplification ratio and stronger output signal is provided.This is due to the following facts: between the port of input and output hybrid coupler and create bypass segment, described port is terminated usually under active mode; And the input port and the output port that are directly connected to the input and output hybrid coupler at active and input/output end port these two lower device of bypass mode.
Among first embodiment of Miao Shuing, the first output by-pass switch SW2 is connected to the 3rd port one 6c of output hybrid coupler 16 in the above.Scheme as an alternative, it can alternatively be connected to output O.In this case, output by-pass switch SW2 will be connected to output O to the 4th port one 6d of output hybrid coupler 16 or bypass branch 19.As further alternative, bypass branch 19 can be connected between the second port one 4b and the output of independent by-passing signal of first hybrid coupler.The second termination element TE2 will be directly connected to the 3rd port one 6c of output hybrid coupler 16 in both cases.If branch 19 is connected to output O, then can omit output by-pass switch SW2 in addition fully.
Fig. 2 shows the circuit diagram of balanced amplifying device according to a second embodiment of the present invention.The amplifier section 10 of this second embodiment and the amplifier section of first embodiment are equal to.Only bypass and isolated part 12 are different at this.In this second embodiment, bypass and isolated part 12 only are made of branch 19, and this branch 19 can comprise transmission line 18.At this, branch 19 comprises two circulator (circulator) C1 and C2, and they connect with transmission line 18.They also all are connected to termination element TE1 and TE2.The first circulator C1 is connected from here to the second port one 4b of input hybrid coupler 14 and the second circulator C2 is connected to the 3rd port one 6c of output hybrid coupler 16.Provide filter F between these two circulator C1 and C2, it is preferably band pass filter.
Circulator C1 and C2 and termination element TE1 and TE2 provide reverse isolation for amplifier under active mode, and signal passes through branch 19 in the same manner as in the first embodiment under bypass mode.Thereby constitute by two circulator C1 and C2 at this this switching device.
This second embodiment has a plurality of advantages.This design does not need switch and bypass segment not to have active block, and this means even without power also can provide bypass operation.Owing to do not have source component, so to be robust reliable and have good LTBF (time between failures) for this solution.
This second embodiment also can be changed.It can comprise more circulators so that other reverse isolation is provided.It also can comprise still less circulator.With its simplest form, it only comprises a circulator.Should also realize that and to omit filter.
Fig. 3 shows the circuit diagram of the balanced amplifying device of a third embodiment in accordance with the invention.The amplifier section 10 of the 3rd embodiment and the amplifier section of first embodiment are equal to.Only bypass and isolated part 12 are different at this.In this embodiment, equally the first and second termination element TE1 and the TE2 of the resistor form by being connected to ground provide isolation.Yet, comprising the 3rd coupling/separative element 20 of the first bypass hybrid coupler, 20 forms and the 4th coupling/separative element of the second bypass hybrid coupler, 22 forms in this branch 19, these two all is provided with four ports.The first bypass hybrid coupler 20 has the first port 20a, the second port 20b that is connected to the first termination element TE1, the 3rd port 20c that connects the first transmission line 18a and the 4th port 20d that is connected to the second transmission line 18b of the second port one 4b that is connected to input hybrid coupler 14.The first transmission line 18a is connected to the first port 22a of the second bypass hybrid coupler 22, and the second transmission line 18b is connected to the second port 22b of the second bypass hybrid coupler 22.The 3rd port 22c of the second bypass hybrid coupler 22 is connected to the second termination element TE2, and the 4th port 22d is connected to the 3rd port one 6c of output hybrid coupler 16.Bypass and isolated part 12 also comprise the first input by-pass switch SW1a and the second input by-pass switch SW1b, the first input by-pass switch SW1a is connected the 3rd port 20c place of the first bypass hybrid coupler 20 between the first transmission line 18a and the ground, and the second input by-pass switch SW1b is connected the 4th port 20d place of the first bypass hybrid coupler 20 between the second transmission line 18b and the ground.Bypass and isolated part 12 comprise the first output by-pass switch SW2a and the second output by-pass switch SW2b at last, the first output by-pass switch SW2a is connected the first port 22a place of the second bypass hybrid coupler 22 between the first transmission line 18a and the ground, and the second output by-pass switch SW2b is connected the second port 22b place of the second bypass hybrid coupler 22 between the second transmission line 18b and the ground.By-pass switch SW1a, SW1b, SW2a and SW2b are preferably provided in PIN diode, but also can for example be provided as transistor or electromechanical relay.At this, the first bypass hybrid coupler 20 moves in the mode identical with input hybrid coupler 14, and the second bypass hybrid coupler 22 moves in the mode identical with output hybrid coupler 16, but operation whether simultaneously.Make transmission line 18a and 18b balance in addition.In this embodiment switching device by the first and second bypass couplers 20 and 22 and by-pass switch SW1a, SW1b, SW2a, SW2b constitute.
Under normal mode, all by-pass switch SW1a, SW1b, SW2a and SW2b are closed (close) and thereby make port 20c, 20d, 22a and 22d ground connection.Therefore any signal that is received on port 20a and 22d is separated in coupler 20 and 22, be reflected, be combined in coupler 20 and 22, be terminated then in termination element TE1 and TE2 at switch SW 1a, SW1b, SW1c and SW1d place.Yet under bypass mode, these by-pass switches SW1a, SW1b, SW2a and SW2b are opened (open), and this is opened and can facilitate or controlled by the control circuit (not shown) by not powering to amplifier A1 and A2.Then, input signal on the first port 20a of the first bypass hybrid coupler 20, be received, separated and as two separation signals be provided on transmission line 18a and the 18b, by 22 combinations of the second bypass hybrid coupler and be supplied to the 3rd port one 6c of output hybrid coupler 16 via the 4th port 22d.
The advantage of this embodiment is to use simpler thereby more cheap switch and still obtains required high reverse isolation of amplifier and the low insertion loss under the bypass mode simultaneously.
Fig. 4 shows the circuit diagram of the balanced amplifying device of a fourth embodiment in accordance with the invention.This device is similar to the device according to the 3rd embodiment in this embodiment.The 4th with the 3rd embodiment between different be here that by-pass switch SW1a ', SW1b ', SW2a ', SW2b ' are connected between associated ports 20c, 20d, 22a, the 22b and thereby corresponding transmission line 18a be arranged to form or disconnect (break) with 18b and be connected accordingly.This switching device also by the first and second bypass couplers 20 and 22 and by-pass switch SW1a ', SW1b ', SW2a ', SW2b ' constitute.But also provide first performance between the input of the 3rd port one 4c of input hybrid coupler 14 and the first amplifier A1 to strengthen switch SW 3a, second performance between the 4th port one 4d of input hybrid coupler 14 and the input of the second amplifier A2 strengthens switch SW 3b, the 3rd performance between the first port one 6a of the output of the first amplifier A1 and output hybrid coupler 16 strengthens switch SW 3c, and the 4th performance between the second port one 6b of the output of the second amplifier A2 and output hybrid coupler 16 strengthens switch SW 3d.First and second performances strengthen switch SW 3a and SW3b this by joint operation forming or to disconnect being connected between amplifier A1 and A2 and the input hybrid coupler 14, and third and fourth performance strengthen switch SW 3c and SW3d this by joint operation with form or disconnection amplifier A1 and A2 and output hybrid coupler 16 between be connected.In operation, when by-pass switch SW1a ', SW1b ', SW2a ', SW2b ' are closed so that when making the signal bypass by bypass branch, all these performances strengthen that switch SW 3a, SW3b, SW3c all open in addition with SW3d and thereby disconnect and being connected accordingly.
The advantage of the 4th embodiment is that it has improved the non-linear behaviour of balanced amplifying device under the bypass mode.
For third and fourth embodiment, multiple modification can also be arranged.Can connect by-pass switch with in the dual mode described in these two embodiment any.Can also omit a pair of by-pass switch, preferably omit the output by-pass switch.The 4th port of the second bypass hybrid coupler can be connected to the 4th port of output hybrid coupler.Yet second termination element will be connected to the 3rd port of output hybrid coupler in this case, and other termination element is connected between the 3rd port and ground of the second bypass hybrid coupler.The performance of the 4th embodiment strengthens switch and can also connect in the mode identical with by-pass switch among the 3rd embodiment.Performance strengthens switch and can be included in addition among first to the 3rd embodiment.
Fig. 5 shows the circuit diagram of balanced amplifying device according to a fifth embodiment of the invention.This device is similar to the device according to the 4th embodiment in this embodiment.The 5th with the 4th embodiment between different the 4th port one 6d that are that the 3rd port one 6c of output hybrid coupler 16 here ends at TE2 and output hybrid coupler 16 be connected to the 4th port 22d of the second bypass hybrid coupler 22, and the 3rd port 22c of the second bypass hybrid coupler 22 is connected to output O.Also only have a pair of by-pass switch SW1a and SW1b, they connect in the mode identical with corresponding by-pass switch among the 3rd embodiment.And only exist a pair of performance to strengthen switch SW 3a and SW3b, they with the 4th embodiment between the same third and fourth port one 4c and 14d and amplifier A1 and A2 that is connected input hybrid coupler 14.In this embodiment switching device by the first and second bypass couplers 20 and 22 and by-pass switch SW1a, SW1b constitute.Under normal mode, and separated, the signal of separation is exaggerated and is combined by output hybrid coupler 16 then input signal by input hybrid coupler 14.The signal of combination is provided to the 4th port 22d of the second bypass hybrid coupler 22 then by the 4th port one 6d from output hybrid coupler 16, this its separated.The signal that separates is then by by-pass switch SW1a and SW1b (it is closed) reflection, is returned to the second bypass coupler 22 and provides as the output on the 3rd port 22c.Under bypass mode, this signal is via the first port 20a of the second port one 4b of input hybrid coupler 14 and the first bypass hybrid coupler 20 and be provided to two the transmission line 18a and the 18b of bypass branch.At this, by-pass switch SW1a is opened with SW1b and the signal that therefore separated is combined in the second bypass hybrid coupler 22 and be provided on the output O as by-passing signal.
The advantage of the 5th embodiment is that it has lower insertion loss under bypass mode.
As previously described, balanced amplifying device according to the present invention has numerous advantages.In amplifier section, there is not bypass module.Thereby there is not a this assembly that the noise factor of amplifying device under active mode worsened.Under bypass branch, very low to the quality requirement of bypass module, reason is their in fact not influences of pair amplifier performance.Thereby these can be cheap.The flexible part of the bypass branch of balanced amplifying device is in addition, and it can be provided with balance or single-ended configuration and have or do not have switch.Outage (power-off) state is easy to be configured at wide frequency ranges and dissimilar changeover modules.Requirement to the reverse isolation of bypass branch is lowered by total this factor of (summary) coupler directivity in addition.
Balanced amplifying device according to the present invention may be provided in the WAP (wireless access point) such as the base station.Fig. 6 has schematically shown this type of base station 24 of communicating by letter with the mobile radio station 26 in the wireless network, and said wireless network is wide area network N.Be provided with according to balanced amplifying device of the present invention in this base station 24.
Although described the present invention in conjunction with specific embodiment, the present invention is not intended to and is limited to the particular form that this paper sets forth.More properly, the scope of the invention is only defined by the appended claims.
Claims (22)
1. a balanced amplifying device (10,12) is configured to operate under normal mode and bypass mode, and comprises:
Signal bypass branch (19),
At least one electric termination element (TE1, TE2), and
Amplifier section (10) comprising:
First and second amplifiers (A1, A2),
First coupling/the separative element (14) comprises at least four ports, wherein
First port (14a) receiving inputted signal,
Second port (14b) is connected to switching device (SW1, SW2; C1, C2,20,22, SW1a, SW1b, SW2a, SW2b; SW1a ', SW1b ', SW2a ', SW2b ') described second port (14b) being selectively connected thereto electric termination element (TE1) or bypass branch (19),
The 3rd port (14c) be connected to first amplifier (A1) input and
The 4th port (14d) is connected to the input of second amplifier (A2), so as to be separated in input signal that first port (14a) go up to receive with via third and fourth port (14c, 14d) offer first and second amplifiers (A1, A2) and
Second coupling/the separative element (16) comprises at least four ports, wherein
First port (16a) is connected to the output of first amplifier (A1),
Second port (16b) be connected to second amplifier (A2) output and
The 3rd port (16c) is used to be connected to electric termination element (TE2),
The wherein said second coupling/separative element (16) is arranged to go up so that be fed to the signal output (O) of described device being made up by the first and second amplifier amplifying signals and being provided at the 4th port (16d) as output signal, and
Described signal bypass branch (19) one ends are via described switching device (SW1; C1; 20) be connected to second port (14b) of the first coupling/separative element (14) and the other end is connected for by-passing signal is fed to the output (O) of described device.
2. balanced amplifying device according to claim 1 (10,12) wherein exists first (TE1) and the electric termination element of second (TE2), corresponding one of them the electric termination element of each the coupling/separative element (14,16) in the amplifier section (10).
3. balanced amplifying device according to claim 1 and 2 (10,12), wherein said switching device comprise at least one circulator (C1, C2).
4. balanced amplifying device (10 according to claim 3,12), wherein the 3rd port (16c) of the second coupling/separative element (16) is connected to described switching device (C1 is C2) to be selectively connected thereto described the 3rd port (16c) electric termination element (TE2) or bypass branch (19).
5. balanced amplifying device according to claim 2 (10,12), wherein said switching device also comprise at least one by-pass switch (SW1; SW1a, SW1b, SW2a, SW2b; SW1a ', SW1b ', SW2a ', SW2b '), described by-pass switch is arranged to second port (14b) of the first coupling/separative element (14) and the first electric termination element (TE1) or branch (19) is connected and provide selectivity supply to by-passing signal to the output of described device.
6. balanced amplifying device according to claim 5 (10,12), wherein said at least one by-pass switch comprise at least one the first input side by-pass switch (SW1 that is associated with the first coupling/separative element (14); SW1a, SW1b; SW1a ', SW1b '), wherein all input by-pass switches coupling/separative elements (14) of being arranged to be associated are connected to corresponding electric termination element (TE1) or described branch (19).
7. balanced amplifying device according to claim 6 (10,12), wherein said selection equipment also comprise at least one the first outlet side by-pass switch (SW2 that is associated with the second coupling/separative element (16); SW2a, SW2b; SW2a ', SW2b '), wherein all output by-pass switches are arranged to output to described equipment selectivity supply to by-passing signal are provided.
8. balanced amplifying device according to claim 7 (10,12), wherein all output by-pass switch (SW2; SW2a, SW2b; SW2a ', SW2b ') coupling/separative element (16) that is arranged to be associated is connected to the second electric termination element (TE2) or described branch (19).
9. according to each described balanced amplifying device (10,12) among the claim 5-7, wherein said switching device comprises:
The 3rd coupling/separative element (20) and the 4th coupling/separative element (22), each all comprises at least four ports, wherein
In the 3rd coupling/separative element (20), first port (20a) is connected to second port (14b) of the first coupling/separative element (14), second port (20b) is connected to the first electric termination element (TE1), the 3rd port (20c) is connected to first port (22a) of the 4th coupling/separative element (22) and the 4th port (20d) is connected to second port (22b) of the 4th coupling/separative element (22), and
The 4th port (22d) of the 4th coupling/separative element (22) be connected to the second coupling/separative element (16) the 3rd or the 4th port (16c, 16d),
Wherein (18a 18b) provides at least one by-pass switch (SW1a, SW1b, SW2a, SW2b at each connection between the 3rd and the 4th coupling/separative element (20,22); SW1a ', SW1b ', SW2a ', SW2b ').
10. balanced amplifying device (10 according to claim 9,12), wherein the 3rd port (22c) of the 4th coupling/separative element (22) is connected to electric termination element (TE2), the 4th port (22d) of the 4th coupling/separative element (22) is connected to the 3rd port (16c) of the second coupling/separative element (16), and the 4th port (16d) of the second coupling/separative element (16) is connected to the output (O) of described device.
11. balanced amplifying device (10 according to claim 9,12), wherein the 3rd port (22c) of the 4th coupling/separative element (22) is connected to the output (O) of described device, the 4th port (22d) of the 4th coupling/separative element (22) is connected to the 4th port (16d) of the second coupling/separative element (16), and the 3rd port (16c) of the second coupling/separative element (16) is connected to electric termination element (TE2).
12. according to each described balanced amplifying device (10,12) among the claim 9-11, wherein each by-pass switch (SW1a, SW1b, SW2a, SW2b) be connected corresponding connection (18a, 18b) with ground between so that optionally make the corresponding ground connection that is connected.
13. according to each described balanced amplifying device (10,12) among the claim 9-11, wherein each by-pass switch (SW1a ', SW1b ', SW2a ', SW2b ') be provided at corresponding connection (18a, 18b) in so that form or disconnect described connection.
14. according to the described balanced amplifying device of arbitrary previous claim (10,12), wherein amplifier section (10) comprises at first and second coupling/separative element (14,16) at least one performance of each connection between strengthens switch (SW3a, SW3b, SW3c, SW3d).
15. balanced amplifying device according to claim 14 (10,12), wherein each performance strengthens switch and is connected between corresponding connection and the ground so that optionally make the corresponding ground connection that is connected.
16. balanced amplifying device according to claim 14 (10,12), wherein each performance strengthens switch (SW3c SW3d) is provided in the corresponding connection so that form or disconnect described connection for SW3a, SW3b.
17. according to each described balanced amplifying device (10 among the claim 14-16,12), being connected that first performance that provides strengthens switch (SW3a) and being second performance enhancing switch (SW3b) that provides that is connected between the input of the 4th port (14b) and second amplifier (A2) of the first coupling/separative element (14) between the input of the 3rd port (14c) that wherein exists for the first coupling/separative element (14) and first amplifier (A1).
18. balanced amplifying device (10 according to claim 17,12), being connected that the 3rd performance that provides strengthens switch (SW3c) and being the 4th performance enhancing switch (SW3d) that provides that is connected between second port (16b) of output and the second coupling/separative element (16) of second amplifier (A2) between first port (16a) of the output that wherein exists for first amplifier (A1) and the second coupling/separative element (16).
19. balanced amplifying device (10 according to claim 1 and 2,12), wherein said signal bypass branch (19) be provided at second port (14b) of the first coupling/separative element (14) and the 3rd or the 4th port of the second coupling/separative element (16) (16c, 16d) between.
20. balanced amplifying device according to claim 1 and 2 (10,12), wherein said signal bypass branch (19) are provided between second port (14b) and described signal output (O) of the first coupling/separative element (14).
21. balanced amplifying device according to claim 1 and 2 (10,12), wherein said signal bypass branch (19) are provided between second port (14b) and the output of independent by-passing signal of the first coupling/separative element (14).
22. be used for the Network Access Point (24) of wireless network (N), comprise according to the described balanced amplifying device of arbitrary previous claim (10,12).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SE2007/050098 WO2008103086A1 (en) | 2007-02-20 | 2007-02-20 | Balanced amplifying device having a bypass branch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101611544A true CN101611544A (en) | 2009-12-23 |
| CN101611544B CN101611544B (en) | 2012-11-21 |
Family
ID=39710289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800516009A Expired - Fee Related CN101611544B (en) | 2007-02-20 | 2007-02-20 | Balanced amplifying device having a bypass branch |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7872526B2 (en) |
| EP (1) | EP2119001A4 (en) |
| CN (1) | CN101611544B (en) |
| WO (1) | WO2008103086A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106852186A (en) * | 2014-10-21 | 2017-06-13 | 瑞典爱立信有限公司 | Radio-frequency multiplexed device |
| CN107231165A (en) * | 2016-03-24 | 2017-10-03 | Ace技术株式会社 | Terminating set for removing passive intermodulation distortion |
| CN110166005A (en) * | 2019-06-12 | 2019-08-23 | 中国科学院武汉物理与数学研究所 | It is a kind of symmetrical expression low noise be acoustically separated from distribution amplification circuit |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100080204A1 (en) * | 2008-09-29 | 2010-04-01 | Kuang-Yu Yen | Wlan transceiving system |
| US8295212B2 (en) * | 2009-08-05 | 2012-10-23 | Alcatel Lucent | System and method for TDD/TMA with hybrid bypass switch of receiving amplifier |
| US10848197B2 (en) * | 2018-05-04 | 2020-11-24 | Psemi Corporation | Hybrid coupler based T/R switch |
| KR20220032840A (en) * | 2020-09-08 | 2022-03-15 | 삼성전기주식회사 | Splitter, front end module, and operating method thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0463231A1 (en) | 1990-06-28 | 1992-01-02 | Siemens Aktiengesellschaft | Pulse power amplifier |
| JPH09148852A (en) * | 1995-11-24 | 1997-06-06 | Matsushita Electric Ind Co Ltd | Transmission output variable device |
| US6208203B1 (en) * | 1998-06-11 | 2001-03-27 | Ace Technology | Low-noise amplifier |
| US6362685B1 (en) * | 2000-07-20 | 2002-03-26 | Rockwell Collins, Inc. | Power amplifier with multilevel power modes |
| US6864743B2 (en) * | 2000-12-22 | 2005-03-08 | Allgon Ab | Microwave amplifier with bypass segment |
| SE519752C2 (en) * | 2000-12-22 | 2003-04-08 | Allgon Ab | Microwave amplifier with bypass segment |
| US6806768B2 (en) | 2001-10-31 | 2004-10-19 | Qualcomm Incorporated | Balanced power amplifier with a bypass structure |
| US6710650B1 (en) | 2002-09-30 | 2004-03-23 | Nortel Networks Limited | Amplifier switching |
-
2007
- 2007-02-20 EP EP07709489.4A patent/EP2119001A4/en not_active Withdrawn
- 2007-02-20 CN CN2007800516009A patent/CN101611544B/en not_active Expired - Fee Related
- 2007-02-20 US US12/527,892 patent/US7872526B2/en active Active
- 2007-02-20 WO PCT/SE2007/050098 patent/WO2008103086A1/en active Application Filing
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106852186A (en) * | 2014-10-21 | 2017-06-13 | 瑞典爱立信有限公司 | Radio-frequency multiplexed device |
| CN106852186B (en) * | 2014-10-21 | 2019-12-31 | 瑞典爱立信有限公司 | Radio frequency multiplexer |
| CN107231165A (en) * | 2016-03-24 | 2017-10-03 | Ace技术株式会社 | Terminating set for removing passive intermodulation distortion |
| CN107231165B (en) * | 2016-03-24 | 2020-10-16 | Ace技术株式会社 | Termination device for removing passive intermodulation distortion |
| CN110166005A (en) * | 2019-06-12 | 2019-08-23 | 中国科学院武汉物理与数学研究所 | It is a kind of symmetrical expression low noise be acoustically separated from distribution amplification circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| US20100026388A1 (en) | 2010-02-04 |
| CN101611544B (en) | 2012-11-21 |
| EP2119001A4 (en) | 2017-01-11 |
| WO2008103086A1 (en) | 2008-08-28 |
| US7872526B2 (en) | 2011-01-18 |
| EP2119001A1 (en) | 2009-11-18 |
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